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<
From version < 1.10 >
edited by Xiaoling
on 2022/05/12 10:05
To version < 7.1 >
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1 +(% class="wikigeneratedid" %)
2 + **Contents:**
3 +
4 +{{toc/}}
5 +
1 1  = 1. Introduction =
2 2  
3 3  This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
... ... @@ -10,6 +10,7 @@
10 10  
11 11  Connection
12 12  
18 +
13 13  [[image:https://wiki.dragino.com/images/thumb/f/f2/RS485_02.png/600px-RS485_02.png||height="743" width="528"]](% style="display:none" %)
14 14  
15 15  Connection
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20 20  * [[Configure Manual>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : Explanation on how to integrate to Node-red and to the Mobile Phone, and with link to the Github code.
21 21  * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
22 22  
23 -
24 24  == 1.2 Example 2: Connect to Pulse Counter ==
25 25  
26 26  This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to Pulse Counter and communicate with Mobile. This example and example 2 compose the structure for a farm IoT solution. The structure is like below:
... ... @@ -29,6 +29,7 @@
29 29  
30 30  Connection
31 31  
37 +
32 32  [[image:https://wiki.dragino.com/images/thumb/5/5f/RS485_02_2.png/600px-RS485_02_2.png||height="337" width="600"]]
33 33  
34 34  Connection
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36 36  * [[Pickdata MIO40 water pulse counter to LoRa with Dragino RS485-LN>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Pulse-Counter/]] : Configure Document
37 37  * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
38 38  
39 -
40 40  == 1.3 Example3: Use RS485-LN with energy meters ==
41 41  
42 42  === 1.3.1 OverView ===
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49 49  This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
50 50  )))
51 51  
52 -[[image:https://wiki.dragino.com/images/thumb/f/f4/Meter1.jpg/600px-Meter1.jpg||height="800" width="600"]]
57 +[[image:https://wiki.dragino.com/images/thumb/f/f4/Meter1.jpg/600px-Meter1.jpg||height="726" width="545"]]
53 53  
54 54  Connection1
55 55  
61 +(((
56 56  How to connect with Energy Meter：
63 +)))
57 57  
65 +(((
58 58  Follow the instructions of the electric energy meter to connect the phase line and the neutral line, and then connect 485A+ and 485B- to RS485A and RA485B of RS485-LN respectively.
67 +)))
59 59  
69 +(((
60 60  The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
71 +)))
61 61  
73 +(((
62 62  Power Source VIN to RS485-LN VIN+
75 +)))
63 63  
77 +(((
64 64  Power Source GND to RS485-LN VIN-
79 +)))
65 65  
81 +(((
66 66  Once there is power, the RS485-LN will be on.
83 +)))
67 67  
68 -[[image:https://wiki.dragino.com/images/thumb/1/15/Meter2.jpg/600px-Meter2.jpg||height="450" width="600"]]
85 +[[image:https://wiki.dragino.com/images/thumb/1/15/Meter2.jpg/600px-Meter2.jpg||height="433" width="577"]]
69 69  
70 70  Connection2
71 71  
72 -[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="800" width="600"]]
73 73  
90 +[[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="712" width="534"]]
91 +
74 74  Connection3
75 75  
76 76  
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91 91  * 5th and 6th bytes: Number of registers to read
92 92  * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
93 93  
112 +(((
94 94  How to parse the reading of the return command of the parameter：
114 +)))
95 95  
96 96  (% class="box infomessage" %)
97 97  (((
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105 105  * The 6th and 7th bytes: CRC16 checksum
106 106  * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
107 107  
108 -
109 109  === 1.3.3 How to configure RS485-LN and parse output commands ===
110 110  
111 111  RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
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120 120  
121 121  [[image:https://wiki.dragino.com/images/b/bc/AT_COMMAND1.png||height="358" width="456"]]
122 122  
123 -**AT COMMAND**
142 +AT COMMAND
124 124  
125 125  (% class="box infomessage" %)
126 126  (((
127 -AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
146 + AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
128 128  )))
129 129  
130 130  a: length for the return of AT+COMMAND
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149 149  
150 150  [[image:https://wiki.dragino.com/images/thumb/c/c2/AT_COMMAND3.png/600px-AT_COMMAND3.png||height="138" width="600"]]
151 151  
171 +(((
152 152  AT COMMAND
173 +)))
153 153  
175 +(((
176 +
177 +)))
178 +
179 +(((
154 154  **Example**: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
181 +)))
155 155  
183 +(((
156 156  RETURN1:01 03 02 00 02 39 85 00 00(return data)
185 +)))
157 157  
187 +(((
158 158  AT+DATACUT1:9,1,4+5+6+7 Take the return value 00 02 39 85 as the valid value of reading current data and used to splice payload.
189 +)))
159 159  
191 +(((
160 160  CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
193 +)))
161 161  
195 +(((
162 162  RETURN2:01 03 02 08 DC BE 1D(return data)
197 +)))
163 163  
199 +(((
164 164  AT+DATACUT2:7,1,4+5 Take the return value 08 DC as the valid value of reading voltage data and used to splice payload.
201 +)))
165 165  
203 +(((
166 166  CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
205 +)))
167 167  
207 +(((
168 168  RETURN3:01 03 04 00 00 00 44 FA 00(return data)
209 +)))
169 169  
211 +(((
170 170  AT+DATACUT3:9,1,4+5+6+7 Take the return value 00 00 00 44 as the valid value of reading total active energy data and used to splice payload.
213 +)))
171 171  
215 +(((
172 172  Payload:01 00 02 39 85 08 DC 00 00 00 44
217 +)))
173 173  
174 174  [[image:https://wiki.dragino.com/images/thumb/9/9b/AT_COMMAND10.png/600px-AT_COMMAND10.png||height="278" width="600"]]
175 175  
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185 185  
186 186  ==== 1.3.3.2 via LoRaWAN DOWNLINK ====
187 187  
188 -[[image:https://wiki.dragino.com/images/thumb/f/fc/DOWNLINK_METER1.png/600px-DOWNLINK_METER1.png||height="423" width="600"]]
233 +[[image:image-20220512104358-3.png]]
189 189  
190 190  (((
191 191  DOWNLINK
... ... @@ -196,12 +196,15 @@
196 196  )))
197 197  
198 198  (((
199 -Type Code 0xAF
244 +**Type Code 0xAF**
200 200  )))
201 201  
202 202  (((
248 +(% class="box infomessage" %)
249 +(((
203 203  0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
204 204  )))
252 +)))
205 205  
206 206  (((
207 207  Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
... ... @@ -266,6 +266,7 @@
266 266  
267 267  DOWNLINK
268 268  
317 +
269 269  [[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png||height="365" width="600"]]
270 270  
271 271  DOWNLINK
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273 273  
274 274  === 1.3.4 How to configure and output commands for RS485 to USB ===
275 275  
325 +(((
276 276  This step is not necessary, it is just to show how to use a normal RS485 to USB adapter to connect to the meter to check the input and output. This can be used to test the connection and RS485 command of the meter without RS485-LN.
327 +)))
277 277  
329 +(((
278 278  First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
331 +)))
279 279  
333 +(((
280 280  Open the serial port debugging, set the send and receive to HEX.
335 +)))
281 281  
337 +(((
282 282  Baud rate: 9600
339 +)))
283 283  
341 +(((
284 284  check digit: Even
343 +)))
285 285  
286 -[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="800" width="600"]]
345 +[[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="725" width="544"]]
287 287  
288 288  USB
289 289  
290 -[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="800" width="600"]]
291 291  
350 +[[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="728" width="546"]]
351 +
292 292  USB
293 293  
354 +
355 +(((
294 294  The configuration command is consistent with the AT command, input the hexadecimal command directly into the serial port, and the serial port will output the command.
357 +)))
295 295  
296 -Example:input：01 03 00 31 00 02 95 c4
359 +(((
360 +**Example:**  input：01 03 00 31 00 02 95 c4
361 +)))
297 297  
298 -{{{ output:01 03 04 00 00 00 42 7A 02
299 -}}}
363 +(((
364 + output：01 03 04 00 00 00 42 7A 02
365 +)))
300 300  
301 301  [[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]
302 302  
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306 306  
307 307  If users need to read the parameters of multiple energy meters, they need to modify the device address, because the default device address of each energy meter is 01.
308 308  
375 +(((
376 +(((
309 309  Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
378 +)))
379 +)))
310 310  
311 311  [[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png||alt="Double meter3.png" height="83" width="600"]]
312 312  
313 -Example:These two meters are examples of setting parameters and device addresses.
383 +**Example**:These two meters are examples of setting parameters and device addresses.
314 314  
315 -[[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="800" width="600"]]
385 +[[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="737" width="553"]]
316 316  
317 -[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="800" width="600"]]
387 +[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="733" width="550"]]
318 318  
389 +(((
390 +(((
319 319  First of all, since the default device address of the energy meter is 01, the configuration of two energy meters will conflict, so we first connect an energy meter and configure the device address.
392 +)))
393 +)))
320 320  
395 +(((
396 +(((
321 321  We can use AT+CFGDEV to set the device address.
398 +)))
399 +)))
322 322  
401 +(((
402 +(((
323 323  We modify the device address 01 of the first energy meter to 02.
404 +)))
405 +)))
324 324  
325 325  [[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]
326 326  
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355 355  * 08 DF is the valid value of the meter with device address 02.
356 356  * 43 62 is the valid value of the meter with device address 01.
357 357  
358 -
359 359  == 1.4 Example 4: Circuit Breaker Remote Open Close ==
360 360  
361 361  This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to SCHNEIDER SMART and Monitor and control your cabinet remotely with no wires and with Dragino RS485-LN LoRaWAN technology. The structure is like below:
... ... @@ -366,7 +366,6 @@
366 366  
367 367  * [[Circuit Breaker Remote Open Close>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Circuit_Breaker_Remote_Open_Close/]] : Configure Documen
368 368  
369 -
370 370  == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
371 371  
372 372  This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-BL to connect to SEM Three Energy Meter and send the data to mobile phone for remote minitor. The structure is like below:
... ... @@ -375,7 +375,6 @@
375 375  
376 376  * [[Connect to SEM Three>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/SEM_Three_Energy_Meter/&file=SEM%20three%20and%20Dragino%20RS485-LN%20v1.pdf]] : Configure Document for RS485-LN
377 377  
378 -
379 379  == 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
380 380  
381 381  This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to CEM C31 485-T1-MID and send the data for remote minitor. The structure is like below:
... ... @@ -382,7 +382,6 @@
382 382  
383 383  * [[CEM C31 485-T1-MID>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/ELECTRICAL%20CABINET/&file=ELECTRICAL%20CABINET%20READINGS.pdf]] : Configure Document For RS485-LN
384 384  
385 -
386 386  == 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
387 387  
388 388  [[image:https://wiki.dragino.com/images/thumb/9/97/PLC_M221.png/600px-PLC_M221.png||height="353" width="600"]]
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